﻿
<%        
Option ExplicIT        
Response.Buffer = True       
Response.Expires = -1        
Session.TimeOut=60        
Call Com_CreatValidCode("Validatecode")        
Sub Com_CreatValidCode(pSN)        
' 禁止缓存        
Response.Expires = -9999        
Response.AddHeader "Pragma","no-cache"       
Response.AddHeader "Cache-Control","no-cache"       
Response.ContentType = "Image/BMP"       
Randomize        
Dim i, ii, iii        
Const cOdds = 0 ' 杂点出现的机率        
' 颜色的数据(字符，背景)        
Dim vColorData(1)        
vColorData(0) = ChrB(204) & ChrB(0) & ChrB(0)  ' 蓝204，绿0，红0（蓝色）        
vColorData(1) = ChrB(252) & ChrB(232) & ChrB(221) ' 蓝252，绿232，红221（浅蓝色）        
' 随机产生字符        
Const cAmount = 10 ' 文字数量        
Const cCode = "0123456789"       
Dim vCode(4), vCodes        
For i = 0 To 3        
  vCode(i) = Int(Rnd * cAmount)        
  vCodes = vCodes & Mid(cCode, vCode(i) + 1, 1)        
Next       
Session("Code") = vCodes  '记录入Session        
' 字符的数据        
Dim vNumberData(35)        
vNumberData(0) = "1110000111110111101111011110111101001011110100101111010010111101001011110111101111011110111110000111"       
vNumberData(1) = "1111011111110001111111110111111111011111111101111111110111111111011111111101111111110111111100000111"       
vNumberData(2) = "1110000111110111101111011110111111111011111111011111111011111111011111111011111111011110111100000011"       
vNumberData(3) = "1110000111110111101111011110111111110111111100111111111101111111111011110111101111011110111110000111"       
vNumberData(4) = "1111101111111110111111110011111110101111110110111111011011111100000011111110111111111011111111000011"       
vNumberData(5) = "1100000011110111111111011111111101000111110011101111111110111111111011110111101111011110111110000111"       
vNumberData(6) = "1111000111111011101111011111111101111111110100011111001110111101111011110111101111011110111110000111"       
vNumberData(7) = "1100000011110111011111011101111111101111111110111111110111111111011111111101111111110111111111011111"       
vNumberData(8) = "1110000111110111101111011110111101111011111000011111101101111101111011110111101111011110111110000111"       
vNumberData(9) = "1110001111110111011111011110111101111011110111001111100010111111111011111111101111011101111110001111"       
vNumberData(10) = "1111011111111101111111101011111110101111111010111111101011111100000111110111011111011101111000100011"       
vNumberData(11) = "1000000111110111101111011110111101110111110000111111011101111101111011110111101111011110111000000111"       
vNumberData(12) = "1110000011110111101110111110111011111111101111111110111111111011111111101111101111011101111110001111"       
vNumberData(13) = "1000001111110111011111011110111101111011110111101111011110111101111011110111101111011101111000001111"       
vNumberData(14) = "1000000111110111101111011011111101101111110000111111011011111101101111110111111111011110111000000111"       
vNumberData(15) = "1000000111110111101111011011111101101111110000111111011011111101101111110111111111011111111000111111"       
vNumberData(16) = "1110000111110111011110111101111011111111101111111110111111111011100011101111011111011101111110001111"       
vNumberData(17) = "1000100011110111011111011101111101110111110000011111011101111101110111110111011111011101111000100011"       
vNumberData(18) = "1100000111111101111111110111111111011111111101111111110111111111011111111101111111110111111100000111"       
vNumberData(19) = "1110000011111110111111111011111111101111111110111111111011111111101111111110111110111011111000011111"       
vNumberData(20) = "1000100011110111011111011011111101011111110001111111010111111101101111110110111111011101111000100011"       
vNumberData(21) = "1000111111110111111111011111111101111111110111111111011111111101111111110111111111011110111000000011"       
vNumberData(22) = "1000100011110010011111001001111100100111110101011111010101111101010111110101011111010101111001010011"       
vNumberData(23) = "1000100011110011011111001101111101010111110101011111010101111101100111110110011111011001111000110111"       
vNumberData(24) = "1110001111110111011110111110111011111011101111101110111110111011111011101111101111011101111110001111"       
vNumberData(25) = "1000000111110111101111011110111101111011110000011111011111111101111111110111111111011111111000111111"       
vNumberData(26) = "1110001111110111011110111110111011111011101111101110111110111011111011101001101111011001111110001011"       
vNumberData(27) = "1000001111110111011111011101111101110111110000111111010111111101101111110110111111011101111000110011"       
vNumberData(28) = "1110000011110111101111011110111101111111111001111111111001111111111011110111101111011110111100000111"       
vNumberData(29) = "1000000011101101101111110111111111011111111101111111110111111111011111111101111111110111111110001111"       
vNumberData(30) = "1000100011110111011111011101111101110111110111011111011101111101110111110111011111011101111110001111"       
vNumberData(31) = "1000100011110111011111011101111101110111111010111111101011111110101111111010111111110111111111011111"       
vNumberData(32) = "1001010011110101011111010101111101010111110101011111001001111110101111111010111111101011111110101111"       
vNumberData(33) = "1000100011110111011111101011111110101111111101111111110111111110101111111010111111011101111000100011"       
vNumberData(34) = "1000100011110111011111011101111110101111111010111111110111111111011111111101111111110111111110001111"       
vNumberData(35) = "1100000011110111011111111101111111101111111110111111110111111111011111111011111111101110111100000011"       
' 输出图像文件头        
Response.BinaryWrITe ChrB(66) & ChrB(77) & ChrB(230) & ChrB(4) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) &_        
  ChrB(0) & ChrB(0) & ChrB(54) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(40) & ChrB(0) &_        
  ChrB(0) & ChrB(0) & ChrB(40) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(10) & ChrB(0) &_        
  ChrB(0) & ChrB(0) & ChrB(1) & ChrB(0)        
' 输出图像信息头        
Response.BinaryWrITe ChrB(24) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(176) & ChrB(4) &_        
  ChrB(0) & ChrB(0) & ChrB(18) & ChrB(11) & ChrB(0) & ChrB(0) & ChrB(18) & ChrB(11) &_        
  ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) & ChrB(0) &_        
  ChrB(0) & ChrB(0)        
For i = 9 To 0 Step -1  ' 历经所有行        
  For ii = 0 To 3  ' 历经所有字        
   For iii = 1 To 10 ' 历经所有像素        
    ' 逐行、逐字、逐像素地输出图像数据        
    If Rnd * 99 + 1 < cOdds Then ' 随机生成杂点        
     Response.BinaryWrITe vColorData(0)        
    Else       
     Response.BinaryWrITe vColorData(Mid(vNumberData(vCode(ii)), i * 10 + iii, 1))        
    End If       
   Next       
  Next       
Next       
End Sub       
%>   
